peters



(No'ModeL) R.B. LANE. I Machine for Making Paper Pulp ,from Wood.

No; 239,801. Patented April 5,1881.

N, PETERS. 'PflDTO-LITHOGRAPNER, WASHINGTON. D. C.

UNITED STATES PATENT OFFICE.

RUFUS B. LANE, OF STOCKTON, CALIFORNIA.

MACHINE FOR MAKING PAPER-PULP FROM WOOD.

SPECIFICATION forming part of Letters Patent No. 239,807, dated April 5,1881.

Application filed September 30, 1880. (No model.) i

.To all whom it may concern:

Be it known that 1, Bonus B. LANE, of Stockton,county of San Joaquin,State of California, have invented an Improvement in Machines forMaking Paper-Pulp from Wood; and I hereby declare the following to be'afull, clear, and exact description thereof.

My invention relatesto certain improvements in machines for makingpaper-pulp from wood, and it is more especially applicable to anapparatus upon which Letters Patent were granted to me October 12, 1880,No. 233,105.

My present improvement relates to the pins which project in rows fromthe depressed channels in the face of the disk or cylinder, and whichserve to wear oft the face of the block of wood, so as to produce thepulp.

In my practice with the machine I have found thatwhen the pins are madewith plain fiat ends the cutting-edges become less effective with use.

My presentinvention is designed to provide an improved cutting orwearing end for the pins, which will do its work better than theplain-ended pins, and which may be removed or sharpened whenevernecessary, as will be more fully explained by reference to theaccompanying drawings, in which- Figure 1 is an elevation of one of thecutting-pins. Fig. 2 shows the pins applied to a cutting-disk. Fig. 3shows the pins applied to a cuttingroller.

a a are a series of pins, which are set in channels in a disk orcylinder, these channels being formed radially within the face when adisk is employed, and longitudinally upon the periphery of the cylinder,as shown in the drawings, when a cylinder is used. These pins stand withtheir onterends slightly above the line of the circumference of thecylinder, so that they will constantly strike the face of the woodenblocks as they are held.against the cylinder, and will thus wear themaway. These pins are set into the channels in diagonal rows, so thatwhile there is considerable space left between the pins for clearancethe pins stand in such relative positions to each other that the wholesurface of the wood will be evenly abraded by them.

In order to provide the proper cutting or abrading surface to the endsof these pins, I form a series of transverse grooves and ridges, 1),upon the end of each pin, these ridges standing lengthwise of thecylinder and at right angles with the line of motion. Each of theseridges is formed with .a cutting-edge,as shown in the enlarged view,Fig. 3. and the woody pulp which is abraded by them will be re-' movedfrom thepins by the water, as described in my former application.

The ridges are formed upon the pins and are kept sharpened, in propercondition for cutting, by means of a machine provided with planingtools,which may be secured so that the tools will be made to traverse the topsof the pins, and thus recut them and put them in the proper condition,as will be readily understood by any one familiar with tools. 1

By my present improvement I greatly increase the effective action of thepins for abrading the wood and forming pulp.

'Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

In an apparatus having a revolving disk, cylinder, or surface, withchannels formed below the surface for the reception of pins, the

pins a, set in said channels in diagonal rows,

and having their outer ends formed into series of ridges and grooves bto cut away an opposing surface, substantially as herein described.

In witness whereof I have hereunto set my hand. I

RUFUS B. LANE.

Witnesses:

FRANK MILLER, (E0. 0. TURNER.

